Designed for use with rodents up to 400 grams, the CX-R will effectively scavenge up to 100% of all waste gas anesthetic gases when connected to an externally vented in-house vacuum or stand alone vacuum source with charcoal filter. The CR-X is effective at a wide range of vacuum pressures and virtually eliminates exposure to anesthetic gases by the investigator. The CX-R comes complete with a stopcock for vacuum regulation and an adjustable incisor bar to keep the rodent in proper orientation with the CX-R regardless of the animals position.